millis | Lightweight millisecond

So I wanted to make a state machine, that gets an input letter from the user and outputs the morsecode using a LED. I used a switch, but for some reason it doesn't want to work. It only worked for letter a, when i added another letter it stop working.

I used 3 functions (dot, line and pause) and combined them for the blinking of the LED. We are not allowed to use the "delay()" in our school so i made a timer.

Started to develop a wiresless 'cable' solution (with websockets) between two ESPs, a wireless serial 'cable' between computer and a serial device to mimick a direct wired connection. Was working great however just accidentally fried one of the ESPs (short a serial cable connection to higher voltage - sigh) when testing. Replaced one of the ESP32s with an ESP8266. Suspect this should work however it did not.

The problem is the ESP8266 (client) cannot find the network of the ESP32 (server). Why it doesn't work? My computer can see the server and can connect. Fried ESP32 the same, no problem.

Tried the WiFiScan demo on the ESP8266 and can detect all other WiFi SSIDs/MACs in neighborhood however cannot detect the ESP32 server it's SSID/MAC.

Why it doesn't work? What is the difference and how can I solve this?

ESP32 - code of the server

I'm confused about using PostgreSQL's TIMESTAMPTZ type with the official JDBC driver.

Correct me if I'm wrong, but PostgreSQL and Java store TIMESTAMTZ and java.util.Date identically: as the number of the millis from the Begin of Unix, defined as 1970-01-01 00:00:00 UTC.

Therefore, technically, we are operating on the same Long value, and we should expect no problems.

However, we've got quite a lot of problems with the code doing a lot of transformations in one or other direction, that were replaced by even more complex transformations, which happen to work afterwards. The end result was a bit similar to https://stackoverflow.com/a/6627999/5479362, with transforming to UTC in both directions. Developing under Windows, where changing timezone is blocked, makes things not easier to debug.

If I have a PostgreSQL table with the column:

It runs with processing time and using a broadcast state.

I wish to get the exact date of first day of last month at 00:00:00Z.
So, here is my current solution:

I am trying to learn Spring webflux. I have written the following code to test the performance of reactive programming. Here is my controller of one service:

I need to write a query in ES that only returns documents that have been created less than N minutes, or hours, ago.

There's a createdTimeStamp field in millis, and I am able to write a simple query like this:

I have two play-once GIFs similar to the ones attached. I'd like to have the first GIF replace the original PNG upon mouseover, but even if someone removes the cursor from the image, finish playing the GIF so the last frame is in place before the mouseout GIF, which is the reverse of the previous one, replaces it and plays. I'd also like the original PNG to replace the mouseout GIF when it is finished playing, too. So, original > mouseover long enough to finish playing > mouseout long enough to finish playing > original.

I tried a javascript I found on here, and it worked to replace the images, but the mouseover GIF kept playing every now and again (even while the cursor was still on it) even though it is a play-once GIF (the script must have kept refreshing the GIF or something).

I'd keep the script in an external file as opposed to inline, of course. I know enough javascript to edit scripts, but not write them from scratch. jQuery is available, if needed.

Thanks for your help!

mouseover GIF mouseout GIF original PNG

ETA: This is what I tried before, although this wasn't the final version of it since I was trying different things on that site that lets you try scripts on, and I think I had the timing set to 2888. I don't have the other script since I didn't save it:

I am trying to distort a grid of images that are displayed randomly when the mouse is clicked.

I have the grid and the random when click.

I have accomplished the distorsion I want when I have only one image.

Now I have to merge both codes together, but I can't figure out how to do it when the PImage is an array.

Grid code: